Light Pathway Quiz

What is the first structure that light encounters when it enters the eye?

• Lens

• Cornea

• Retina

• Optic nerve

• Pupil

What is the main function of the cornea in the light pathway?

• Absorbs light to prevent damage

• Bends light as it enters the eye

• Converts light into electrical signals

• Transmits light without bending it

• Detects color and depth

What is the function of the aqueous humor in the eye?

• Provides nutrients and prevents light from scattering

• Converts light into nerve signals

• Reflects light back to the cornea

• Controls pupil size

• Helps focus near and far objects

What is the function of the iris?

• Focuses light on the retina

• Converts light into nerve signals

• Controls the size of the pupil

• Absorbs excess light

• Sends signals to the brain

What happens to the pupil in bright light?

• It dilates (gets larger)

• It constricts (gets smaller)

• It stays the same size

• It absorbs all light

• It focuses light onto the optic nerve

Tags

NGSS.HS-LS1-3

Which muscles control the size of the pupil?

• Suspensory ligaments

• Ciliary muscles

• Radial muscles of the iris

• Optic nerve fibers

• Fovea muscles

What happens when you look at a distant object?

• The lens becomes round and thick

• The lens flattens and thins

• The ciliary muscles contract

• The suspensory ligaments loosen

• The pupil constricts

Which structures control the shape of the lens?

• Radial muscles

• Aqueous humor

• Suspensory ligaments and ciliary muscles

• Optic nerve fibers

• Retina and fovea

What is the term for the process of adjusting the lens to focus on near or far objects?

• Acuity

• Adaptation

• Accommodation

• Perception

• Transduction

What is the primary function of the retina?

• Focuses light onto the cornea

• Converts light energy into electrical signals

• Regulates pupil size

• Bends light to focus on the lens

• Controls movement of the eye